Furnace



- 4 Sheets-Sheet 1.

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H N MU L A N m WP S W Patented June 28,1898.

(No Model.)

4 sheets-sheet 2. W. STUBBLEBINE.

FURNACE.

No. 606,600. Patented June 28, 1808.

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4 H N I B E L B B U T S W FURNAGEL 'Ne; 606,600. Patented June 28,1898.

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' UNITED STATESAPATENT @FFICE WILLIAM STUBBLEBINE, or BETHLEHEM, PENNSYLVANIA.

FURNACE.

SFEGIFIGATIQN forming part of Letters Patent N 0. 606,600, dated June 28, 1898.

Original application filedllanuary 2 6, 1897, Serial No.'620,816. Divided and this application filed March 9, 1898. Serial No.

. 573,215. (Nomodeld To all whom, it may concern:

Be it known that I, WILLIAM STUBBLEBINE, a citizen of the United States, residingat Bethlehem,in'the county of Northampton and State of Pennsylvania, have invented certain new and useful Improvements in Furnaces; and I do hereby declare the'following to be a full,

' clear, and exact description of the invention,

such as will enable others skilled in the art to which itappertains to make and use the same;

This invention relates to improvements in furnaces of that class in which the heat and waste gases of the working chamber are utilized as the medium for heating the air-blast preliminary to admitting the latter, in whole or in part, to the working chamber; and the object that I have in view is, primarily, to provide a simple arrangement of parts by Which the blast may be advantageously and economically heated prior to its admission to the working chamber. i I i A further object of the invention is to provide a novel construction of the furnace in which the charge of metal may be heated preliminary to placing the same in the Working or puddlingchamber of the furnace, although I would have it understood that the improvements are not restricted tov their use exclu sively in paddling-furnaces, because part of the invention contemplates the construction sion to the working chamber.

The invention of this application is, in'part, a division of a prior application filed "by me on the 26th day of January, 1897, Serial No. 620,816 but it also contemplates the provision of certain other improvements, which I shall hereinafter describe.

The invention consists in the combination, with a working chamber, a stack, and an uptake from the working chamber to said stack, of preliminary heating-chambers which are in communication with the working chamber and with the stackand are provided with upper compartments, mixing-pipes leading from said upperico'mpartments, steam-pipes passin g through the upper compartments and discharging into the mixing-pipes, and air-pipes also leading through the upper compartments and discharging into the mixing-pipes, wheretion with a working chamber, of a regenerative chamber situated at the end of the furnace opposite tothe stack and containing a lower receiving-compartment and suitable checker-work, a delivery-chamber in communication With the. upper part of the regenerative chamber, and an arched roof over the working chamber, provided with ports which establish communication between the delivery-chamber and the working chamber adjacent to the bridge-wall in the latter chamber,

and the invention further consists inthe Inovel combinationof elements and in the construction and arraugementof parts, all as 'will'be hereinafter more fully described and claimed. I i

To enable others to understand my inventio'n,I have'ill'ust'rated the preferred embodiment thereof in the accompanying drawings,

forming apart of :this specification, and in which i Figure 1 is a vertical longitudinal sectional ele'vationfthrough a furnace constructed in accordance with'the-invention. Fig. 2 is a horizontal sectional View on the plane indicated bythe dotted line 2 2 of Fig. 1. Fig. 3 is a: vertical transverse sectional elevation through the working chamber of the furnace,

on the planeiudicated by the dotted line 3 3 of Fig. 2, looking in the'direction indicated by the arrow. Fig. 4 is a similar transverse sectional elevation through the preliminary heatin g-chambers and their compartments, on the .plane indicated by the dotted line t 4 of Fig.

1, looking in the direction indicated by the .arrow. Fig. 5 is a transverse sectional elevation on the plane indicated by the dotted line 5 5 of Fig. 1, said section being taken through the regenerative chamber. Fig. 6 is a vertifrom the grate-chamber of the furnace may be delivered directly in the Iregenerative chamber.

Like numerals of reference denote like and corresponding parts in each of the several figures of the drawings.

1 designates the working chamber of the furnace, which is similar in all respects to the chambers of analogous furnaces of the class to which this invention belongs, having the usual charging-doors 2. At one end of this chamber 1 is the bridge-wall 3, which separates the working chamber from the grate-chamber at, and in the working chamber is the usual bed 5, and the bottom 6. The stack or uptake 0 is of the usual pattern, and it communicates with the delivery end of the working chamber by a neck or port 7, which is formed in the stack on the side next to the working chamber. The walls 8 of the working chamber converge from the sides thereof to the neck or port 7, and through these converging walls 8 open the ports 9, which are at the inner terminals of the conducting-passages 10, that establish communication between the working chamber and the heatingchambers 11 12. These heating-chambers 11 12 are formed in the masonry of the stack or uptake on opposite sides of the fine and the neck or port 7, and these chambers 11 12 are designed to receive the charge or charges of metal which are to be heated prior to placing them into the working chamber, so as to be subjected to the puddling operation. To e11- able the convenient introduction and removal of the metal to be effected to and from these heating-chambers 11 12, I provide the latter with the charging-doors 13, of any approved construction, which doors open laterally through the sides of the furnace.

The conducting-passages 10 are inclined from the middle part of the working chamber to nearly the bottom of the floors of the heating-chambers 11 12, and as the function of these chambers 11 12 is to heat the metal prior to its introduction into the working chamber I shall hereinafter designate the chambers 11 12 as the preliminary heatingchambers. The heat and gases supplied from the working chamber to the preliminary heating-chambers by the conducting-passages 10 are permitted to circulate in said chambers 11 12, and they are delivered or discharged therefrom through the ports 14, which are formed in the walls of the stack and extend from the chambers 11 12 to the flue or uptake of the furnace, thus providing for the circulation'th rough the preliminary heatin g-chambers of part of the heat and gases from the working chamberto be utilized as the medium for heating the charges of metal.

Each preliminary heating-chamber is provided with an arch 15 at a suitable distance below the roof 16 thereof, and an upper compartment 17 is thus provided in the stackwall above each heating-chamber 11 or 12, the upper compartments being formed by and between the roofs, the arches, and extensions of the walls of the preliminary heating-chambers. The arch 15 to each chamber 11 or 12 is provided with a plurality of ports or passages 18, which permit a part of the waste heat and gases admitted from the working chamber to the preliminary heating-chamber to pass through said ports or passages 18 into the upper compartment 17. From this compartment 17 of each preliminary heat-ingchamber leads a mixing-pipe 20, which extends through the roof 16 and opens into the compartment 17 at a suitable distance above the arch 15, the extremity of this pipe terminating in a mouth 21, that is open for the ingress of the heat and waste gases admitted to the compartment 17 from the preliminary heating-chamber.

Through the outside wall of the compartment 17 of the preliminary heating-chamber leads an air-blast pipe 22, which extends into the compartment 17 and terminates in an upwardly-facing elbow 23, the diameter of which is less than the diameter of the inlet-mouth 21 to the mixing-pipe 20. This elbow 23 of the air-blast pipe terminates in the mouth of the mixing-pipe; but an annular space is provided around the elbow and between it and the inlet-mouth 21, so as to provide for the passage of the waste gases and heat from the upper compartment 17 to the mixing-pipe 20. Through this air-blast pipe 22 is carried the steam-jet pipe 24, which extends through the elbow 23 and into the mouth of the mixingpipe, and the air-blast pipe and the steampipe lead from suitable sources of supply for compressed air and steam, respectively.

It will thus be seen that I have provided an improved construction of the furnace by which the waste heat and gases from the working chamber may be utilized for preliminarily heating charges of metal placed in the preliminary heating-chambers and that part of such waste heat and gases pass from the preliminary heating-chambers 11 12 to the mixing-pipes 20, to be commingled in said pipes with air-blasts and currents of steam. These commingled currents of the waste heat and gases, the air-blasts, and the jets of steam are carried through the mixing-pipes lengthwise along and above the working chamber of the furnace.

At the front end of the furnace, or at that end opposite to the stack, 1 provide the regenerative chamber 25, which extends transversely across the furnace the full width thereof. This regenerative chamber 25 is provided interiorly with a partition 26 near its lower part, forming a receiving-compartment 27, and to this receivingeompartment of the regenerative chamber are connected the front ends of the longitudinal mixing pipes or ilues 20, which lead from the upper compartments of the preliminary heating-chambers, the commingled or mixed heat or gases, the air-blast, and the jets of steam being discharged from the mixing-pipes 20 into the receiving-compartment27 of the transverse resuitable distance in said chamber 25.

generative chamber 25. From this lower par-l tition 26 of the regenerative chamber extends a series of vertical isolated flues 28,

which are formed by tiles or in any suitable tains a plurality or series of the isolated flues roof joins with the front of the furnace or 28, through which pass the mixed currents of heat or gases, steam, and air delivered by the mixing tubes or pipes 20, and each series of vertical isolated fiues 28 is spaced or separated from one or more adjacent series of corresponding flues 28 to provide the circulatingspaces 30, which are in communication with the front part of the working or grate cham-. ber by the transverse series of longitudinalpas'sages 31, formedin the wall 32, that separates the regenerative chamber from the working or grate chamber. Apart of the heat and gases from the working or grate chamber is permitted to pass through thefiues or passages 31 into. the circulating-spaces .30, between theisolated fines 28in said regenerative chamber 25, thus making provision for heating the .fiues 28-and the checker-work 29 by a part of the heat and gases from the working or grate chamber. As the isolated vertical flues 28 discharge their contents (which are heated by contact with the walls of said fines 28) into the checker-work and as the heat and gasesadmitted through the passages 31 from the working or grate chamber pass upwardly between the isolated fiues28 the mixed currents from the isolated flnes 2S and the waste heat and gases from the circulatingspaces are commingled as they pass through the checker-work and are regenerated bysaid checker-work. v j

The front of the roof .33 of the working chamber is arched or deflected downwardly at 34 over the grate-chamber, and this arched or deflected part 34 of the working-chamber with the rear wall of the regenerative chamher. The arched part 34 of the roof has a series of inclined ports 35, whichlie immediately over the grate-chamber and in advance of the bridge-wall'therein, and these ports 35 are inclosed within a delivery-chamber 36,

erected on the arched part 'of the roof 33, the top of which delivery-chamber is covered by the roof 36'of the regenerative chamber 25. The commingled heat or gases, the blast, and the steam which pass through the isolated flues 28 of the regenerative chamber and the heat and gases from the grate-chamber supplied by the passages 31 to the circulatingspaces in said regenerative chamber are regenerated by the checker-work and commingled together in said checker-work in the space 37 above the checker-work, and from this space said commingled currents pass through the passages 39 into the delivery-chamber 36, from whence they are returned through the roof-ports 35 back into the grate-chamber to ing from the gratechamber over the bridgewall back into the working chamber.

Under some conditions of service I prefer to take a. part of the blast which is supplied by a pipe 40 to the grate-chamber directly from said pipe and lead the air' blast or a part 27 of the regenerative chamber 25, as shown by Fig. 6. Referring to .this figure of the drawings, the air-blast pipe 40 is shown as arranged below the grate of the grate-chamber, and from it extend the vertical branches41 42, (see full lines in Fig.6 and dotted lines in Fig. 2,) said branches being ledupwardly through the grate-chamber and thence car compartment of the regenerativechamber. Provision is thus madefor commingling atmospheric air from the blast-pipe withthe steam supplied by the mixing pipesor fiues ative chamber. v Ialso contemplate the employmentof means for the admission of an air-blast directly to the lower receiving-compartment of the re- :Fig. 6, in which the blast-pipe 43 is carried from a suitable forcingapparatus or other source ofsupply to the furnace at the end thereof adjacent to the regenerator chamber, and this blast-pipe has a regulating-valve 44 in one length thereof adjacent to the horitop of the regenerator-chamber. This horitovertical branches 46, which extend down through-the regenerator-chamber at the sides of the furnace, and said vertical branches discharge to the lower receiving-compartment of the regenerator-chamber for the air-blast to icommingle with the heat, waste gases, &c., supplied by the tines leading from the greater chamber and by the mixing pipes or flues,

It is thought that the operation and advantages of my invention will be fully under- ;stood and appreciated by those skilled in the connection with the drawings.

proportion of parts'a'nd in the details of construction of the devices herein shown and described as the preferred embodiment of the invention may be made bya skilled mechanic ing the advantages of said invention, and I in the scope of the invention.

ried horizon-tally into the lower receivingcurrents of commingled gases or heat, air,an'd

generative chamberr This isrepresented by zontal branch 45, which extends across the zontal branch of the blast-pipe discharges art from the foregoing description, taken in.

I am aware that changes in the form'and:

Having thusfully described my invention,

be commingled with the flame and gases pass- I thereof into the lower receiving-compartment to the receiving-compartment of the regenerwithout departing from the-spirit or sacrificwhat I claim as new, and desire to secure by Letters Patent, is

1. In a furnace, the combination with a working chamber, a stack, and a port or neck, of the preliminary heating-chambers situated on opposite sides of the uptake and each provided with an upper compartment, passages which establish communication between the working chamber, the preliminary heatingchambers, and the uptake, and circulatingpipes opening into the upper compartments of said preliminary heating-chambers, substantially as and for the purposes described.

2. In a furnace, the combination with a working chamber, a stack, and an uptake, of the preliminary heating-chambers situated on opposite sides of the uptake and each having below its roof a perforated arch which forms an upper compartment, the mixingpipes leading from the upper compartments of said chambers, the air and steam pipes e11- tering said upper compartments and discharging t0 the mixing-pipes, and passages which establish communication between the preliminary heating-chambers, the working chamber, and the uptake, substantially as described.

3. In a furnace, the combination with a working chamber, and a grate-chamber, of the divided regenerative chamber having the lower receiving-compartment, the isolated fi ucs leading from said receiving-eompartment of the regenerative chamber, the checkerwork located in the regenerative chamber above the isolated flues therein, the mixing pipes or flues discharging into the receivingeompartment of said regenerative chamber, and the passages leading from the grate-chamber into the circulating-spaces between the isolated fines of the regenerative chamber, substantially as described.

t. In a furnace, the combination with the working and grate chambers, of the roof therefor having the arched or deflected portion over the grate-chamber, a regenerative chamber containing checker-work, mixing-Hues which discharge to the regenerative chamber, passages leading from the grate-chamber to the regenerative chamber, and a delivery-chamber which is in communication with the upper part of the regenerative chamber to receive therefrom and which discharges, through the ports in the arched roof, into the grate-chamber, substantially as described.

5. In a furnace, the combination with a working chamber, and a grate-chamber, of the divided regenerative chamber having the receiving-compartment, the vertical isolated flues in series within the regenerative chamber and arranged therein to provide the circulating-spaces, the checker-work above said fiues, the passages leading from the gratechamber to the circulation-spaces of the regenerative chamber, the delivery-chamber over the grate-chamber, ports between the delivery and regenerative chambers, and ports leading from the delivery-chamber to the grate chamber, substantially as described.

6. In a furnace, the combination with a grate-chamber, of a regenerative chamber having a lower receiving-compartment, the checker-work in said regenerative chamber, mixing pipes or flues discharging to the receiving-compartment of the regenerative chamber, a blast-pipe below the grate of the grate-chamber and having branches which lead to the receiving-compartment of the regenerative chamber, passages leading from the grate-chamber to the regenerative chamber, and other passages leading from the upper part of the regenerative chamber back to the upper part of the grate-chamber, substantially as described.

In testimony whereof I affix my signature in presence of two witnesses.

\VILLIAM STUBBLEBINE.

Vitnesses:

T 0. FRADENECK, JAS. D. SCHALL. 

